python3-tornado: Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart...
CVE-2026-91990 is fixed in 10 products on 1 platform, first by ALSA-2026:67147, released September 14, 2026. It is not reported as exploited. Patch Radar priority: High.
Tornado before 6.5.8 contains a memory amplification vulnerability in parse_multipart_form_data that splits multipart data before validating the max_parts limit. Attackers can send crafted multipart requests with many parts to create large transient lists, exhausting server memory and causing denial of service.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| python-tornado · RHEL 10 | 6.5.8-0.el10_0.1 | RHSA-2026:80741 | Sep 14, 2026 |
| python-tornado · Ubuntu 18.04.6 LTS (bionic) | 4.5.3-1ubuntu0.2+esm4 | python-tornado 4.5.3-1ubuntu0.2+esm4 | Oct 24, 2026 |
| python-tornado · sles 15.6 | 4.5.3-150000.3.31.1 | SUSE-SU-2026:4404-1 | Sep 30, 2026 |
| python-tornado · sles 15.7 | 4.5.3-150000.3.31.1 | SUSE-SU-2026:4404-1 | Sep 30, 2026 |
| python-tornado-debugsource · amzn 2023 | 6.1.0-2.amzn2023.0.11 | ALAS2023-2026-3177 | Nov 7, 2026 |
| python-tornado-doc · amzn 2023 | 6.1.0-2.amzn2023.0.11 | ALAS2023-2026-3177 | Nov 7, 2026 |
| python-tornado6 · opensuse-leap 16.0 | 6.5-160000.7.1 | OPENSUSE-SU-2026:22059-1 | Nov 7, 2026 |
| python-tornado6 · sles 15.6 | 6.3.2-150400.9.27.1 | SUSE-SU-2026:4403-1 | Sep 30, 2026 |
| python-tornado6 · sles 15.7 | 6.3.2-150400.9.27.1 | SUSE-SU-2026:4403-1 | Sep 30, 2026 |
| python-tornado6 · sles 16.0 | 6.5-160000.7.1 | SUSE-SU-2026:24207-1 | Nov 7, 2026 |
| python3-tornado · RHEL 9 | 0:6.5.8-0.el9_8.1 | RHSA-2026:67146 | Sep 19, 2026 |
| python3-tornado · Ubuntu 18.04.6 LTS (bionic) | 4.5.3-1ubuntu0.2+esm4 | python3-tornado 4.5.3-1ubuntu0.2+esm4 | Oct 24, 2026 |
| python3-tornado · Ubuntu 22.04.1 LTS (jammy) | 6.1.0-3ubuntu0.1~esm6 | python3-tornado 6.1.0-3ubuntu0.1~esm6 | Oct 24, 2026 |
| python3-tornado · Ubuntu 24.04.5 LTS (noble) | 6.4.0-1ubuntu0.6 | python3-tornado 6.4.0-1ubuntu0.6 | Oct 24, 2026 |
| python3-tornado · Ubuntu 26.04.1 LTS (resolute) | 6.5.4-0.1ubuntu0.2 | python3-tornado 6.5.4-0.1ubuntu0.2 | Oct 1, 2026 |
| python3-tornado · almalinux 10 | 6.5.8-0.el10_2.1 | ALSA-2026:67147 | Sep 14, 2026 |
| python3-tornado · almalinux 9 | 6.5.8-0.el9_8.1 | ALSA-2026:67146 | Sep 14, 2026 |
| python3-tornado · amzn 2023 | 6.1.0-2.amzn2023.0.11 | ALAS2023-2026-3177 | Nov 7, 2026 |
| python3-tornado-debuginfo · amzn 2023 | 6.1.0-2.amzn2023.0.11 | ALAS2023-2026-3177 | Nov 7, 2026 |
| python3.13-tornado · amzn 2023 | 6.4.2-1.amzn2023.0.6 | ALAS2023-2026-3176 | Nov 7, 2026 |
| python3.13-tornado-debuginfo · amzn 2023 | 6.4.2-1.amzn2023.0.6 | ALAS2023-2026-3176 | Nov 7, 2026 |
| python3.13-tornado-debugsource · amzn 2023 | 6.4.2-1.amzn2023.0.6 | ALAS2023-2026-3176 | Nov 7, 2026 |
| python3.13-tornado-doc · amzn 2023 | 6.4.2-1.amzn2023.0.6 | ALAS2023-2026-3176 | Nov 7, 2026 |
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